Your backend should help your product scale, not slow it down. I’m a Python Backend Developer specializing in AI-powered systems, FastAPI applications, Django backends, APIs, SaaS platforms, and MVP development for startups and growing businesses. I help founders and teams build scalable backend systems that are fast, maintainable, and production-ready. Whether you need an AI agent workflow, a SaaS backend, API architecture, automation system, or an MVP built from scratch, I focus on clean engineering and reliable performance. I have experience building: • AI Agents & AI-powered workflows • FastAPI and Django backend systems • REST APIs and third-party integrations • SaaS platforms and startup MVPs • Authentication, billing, and role-based systems • PostgreSQL database architecture and optimization • Cloud deployments with AWS, Docker, and CI/CD • Automation systems and async workflows I work with technologies including Python, FastAPI, Django, PostgreSQL, Redis, Docker, AWS, OpenAI, LangChain, Supabase, and modern API architectures. I also work comfortably with existing codebases. Many clients hire me to improve backend performance, refactor unstable systems, fix scaling issues, or extend already-running products without breaking existing functionality. Why clients work with me: • Clear communication and fast response time • Clean, scalable, maintainable backend architecture • Business-focused development, not just coding • Reliable delivery and long-term technical thinking • Experience working with startups, SaaS products, and AI systems If you’re building an AI product, SaaS platform, backend API, or MVP and need a developer who understands both product thinking and backend engineering, feel free to send me a message with your project details.

I’m Sandeep, a Senior Backend & AI Engineer with 5+ years of experience building AI-enabled SaaS platforms, high-performance APIs, LLM/RAG workflows, and production-ready microservices. I specialize in Python, FastAPI, Django, REST APIs, microservices, PostgreSQL, Redis, MongoDB, vector databases, LangChain, OpenAI/LLM integrations, Docker, Kubernetes, AWS, and GCP. My focus is to convert ideas and prototypes into secure, scalable, and maintainable production systems. At Coretus, I also work with reusable Microservices Accelerators for common backend foundations like authentication, RBAC, payments, notifications, API structure, and deployment patterns. This helps reduce repetitive setup work and allows more focus on your core business logic, AI workflows, and product scalability. What I can help you with : Backend Architecture & API Development  I build secure and scalable backend systems using Python, FastAPI, Django, REST APIs, OpenAPI/Swagger, PostgreSQL, MongoDB, Redis, and clean microservice patterns. AI, LLM & RAG Development  I develop AI-powered backend systems, RAG pipelines, LLM API integrations, LangChain workflows, embeddings, vector search, AI agents, and automation layers. SaaS & Multi-Tenant Platforms  I design backend systems for SaaS products with role-based access, tenant isolation, admin workflows, subscription/payment logic, dashboards, and scalable database structures. Async Processing & Data Workflows I build queue-based systems using Celery, Kafka, RabbitMQ, Redis, background jobs, event-driven workflows, and high-volume data processing pipelines. Cloud, DevOps & Production Deployment I dockerize applications, set up CI/CD pipelines, deploy on AWS, GCP, Kubernetes, AWS Lambda, or GCP Cloud Run, and support production debugging and performance optimization. I have worked on backend and AI systems for: AI recruitment SaaS with resume parsing, candidate matching, LLM integration, and vector search AI nutrition and meal planner app with food recognition, GPT APIs, Redis caching, and personalized recommendations Multi-tenant scheduling SaaS with calendar sync, timezone handling, payment workflows, and queue-based booking logic Algorithmic trading backend with Kafka, Redis, WebSockets, broker APIs, and real-time analytics Real-time communication app with WebSocket/WebRTC signaling, Redis sync, and low-bandwidth messaging workflows Job platform with REST APIs, Elasticsearch search, application workflows, and third-party integrations Why clients work with me Strong Python, FastAPI, Django, and backend architecture experience Practical experience with AI, LLM, RAG, vector databases, and automation workflows Scalable SaaS and microservices development approach Clean API structure with authentication, RBAC, documentation, and maintainable code Production-focused mindset from architecture to deployment Clear communication and reliable delivery Whether you need a backend from scratch, an AI/RAG feature, a scalable SaaS architecture, API optimization, automation workflows, or cloud deployment support, I can help you build a reliable technical foundation. Let’s connect and discuss how we can turn your backend idea into a secure, scalable, and production-ready system. Sandeep Thesiya Senior Backend & AI Engineer | Python | FastAPI | SaaS | RAG | Microservices

As a software engineer with over 8 years of experience in software development, I am a versatile and results-driven professional with a strong passion for crafting end-to-end solutions. My expertise spans across FrontEnd, BackEnd, and DevOps, enabling me to build software applications from the ground up and successfully deploy them into production. I believe in fostering transparency, delivering tangible value, and continuously expanding my skill set to stay ahead of industry trends. I thrive in environments where learning is a constant, and I am always eager to explore new technologies and tools to optimize the development lifecycle. Technical Expertise: Programming Languages: Python, Golang (Go), JavaScript Frameworks/Libraries: Flask, Django, FastAPI, Angular, Express.js, Gin Databases: PostgreSQL, MongoDB, Redis Reporting Tools: Grafana, Metabase DevOps Tools: Docker, Kubernetes, Helm, Git, Celery Cloud Providers: AWS, GCP These are just some of the technologies I have worked with, and I am eager to expand my skill set as I continue to evolve in my career.

⭐️Proficient in complex Python and Django project architecture, development, and maintenance. ⭐️Skilled in using Django to build prototypes/MVPs, scalable production systems, designing and building APIs using Django REST Framework with complex role-based permissions, Celery task-based background processing, and API integration with external providers. ⭐️Experienced in understanding Django's pros and cons, and adept at finding and debugging bugs quickly and effectively. ⭐️Deeply understand frontend to backend interactions and comfortable working in a team with frontend engineers. ☑ QUALIFICATIONS SUMMARY: ⭐️ Define technical requirements, documentation ⭐️ Design the project architecture & database schema, data and schema migrations ⭐️ Review and audit the existing solution, design, and system architecture ⭐️ Write high-quality and well-organized code, covered with tests ⭐️ Refactor the legacy code step-by-step without revolution ⭐️ Code review and propose improvements ☑ TECH STACK: ⭐️Front-end Development JavaScript / React JS/ Redux/ Redux Toolkit/ Tailwind.CSS/ ⭐️Back-end Development Python / Django / REST API (DRF) / MySQL / SQLite / MongoDB / PostgreSQL ☑ADDITIONAL SKILLSETS OF MINE: ⭐️CMS ▹Word press ▹wix ⭐️DATABASE ▹MySQL ▹SQLite ▹Postgress ▹MongoDB DESIGN ▹Figma ⭐️TOOLS ▹Git (GitHub) ▹Trello ▹ Postman ⭐️PROGRAMMING LANGUAGES ▹ C ▹ C++ ▹ Java ▹ JavaScript (Advanced) ▹ TypeScript ▹ Python(Advanced) ▹ PHP ▹ RUST ⭐️COMPETITIVE PROGRAMMING ▹ Leetcode ( I have solved more than 150 Leetcode questions.) 𝑰𝒇 𝒚𝒐𝒖'𝒗𝒆 𝒓𝒆𝒂𝒅 𝒕𝒉𝒊𝒔 𝒇𝒂𝒓, 𝒚𝒐𝒖'𝒗𝒆 𝒂𝒍𝒓𝒆𝒂𝒅𝒚 𝒅𝒊𝒑𝒑𝒆𝒅 𝒂 𝒕𝒐𝒆 𝒊𝒏𝒕𝒐 𝒎𝒚 𝒘𝒐𝒓𝒍𝒅. 𝑳𝒆𝒕'𝒔 𝒔𝒆𝒕 𝒖𝒑 𝒂 𝒄𝒂𝒍𝒍 𝒂𝒏𝒅 𝒅𝒊𝒔𝒄𝒖𝒔𝒔 𝒚𝒐𝒖𝒓 𝒊𝒅𝒆𝒂 𝒊𝒏 𝒎𝒐𝒓𝒆 𝒅𝒆𝒕𝒂𝒊𝒍!

𝐒𝐞𝐧𝐢𝐨𝐫 𝐏𝐲𝐭𝐡𝐨𝐧 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 (Python, Django, FastAPI) with 10+ years building production Python backend systems, Python AI/LLM integrations, and Python automation. Top Rated Python Developer with 100% Job Success across 21 Python projects, $100K+ earned, and 3,900+ Python hours delivered. Most Python projects don't fail because the idea was weak. They fail because the Python API is slow, the Python automation breaks under real load, or the Python AI integration gives unreliable answers in production. That's exactly the part I fix as a Python expert. I'm Usman, a Python developer who has worked with startups and businesses across SaaS, fintech, healthcare, and AI, turning rough ideas into reliable Python products that are fast, secure, and built to scale. You won't just get code. You'll get a Python solution that actually moves your business forward. 𝐖𝐇𝐀𝐓 𝐈 𝐂𝐀𝐍 𝐃𝐎 𝐅𝐎𝐑 𝐘𝐎𝐔 𝐏𝐲𝐭𝐡𝐨𝐧 𝐀𝐈, 𝐋𝐋𝐌𝐬 & 𝐑𝐀𝐆 - Python LLM integration: OpenAI GPT, Anthropic Claude, Gemini, open-source models - Production Python RAG pipelines: chunking, embeddings, vector search, reranking, evaluation - Python AI agents and chatbots for sales, CRM, support, and workflow automation - LangChain, LangGraph orchestration in Python; Pinecone and vector databases - Accurate, reliable AI output tuned for production, not just "it works" 𝐏𝐲𝐭𝐡𝐨𝐧 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 & 𝐀𝐏𝐈𝐬 - Scalable Python backend APIs with Django, Django REST Framework, FastAPI, Flask - Python SaaS architecture: multi-tenant, auth, billing, admin dashboards - Microservices and async processing with Celery, Redis queues, and webhooks - Solid database design: PostgreSQL, Redis, MongoDB - Third-party integrations: Stripe, Twilio, and REST/webhook APIs 𝐏𝐲𝐭𝐡𝐨𝐧 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 & 𝐃𝐚𝐭𝐚 - Python automation systems and ETL pipelines built from scratch - Python web scraping and structured data delivery - No-code/low-code automation with n8n, Make, and Zapier 𝐂𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬 - AWS, GCP, Docker, Kubernetes - CI/CD with GitHub Actions, monitoring, and long-term support 𝐑𝐄𝐒𝐔𝐋𝐓𝐒 𝐈'𝐕𝐄 𝐃𝐄𝐋𝐈𝐕𝐄𝐑𝐄𝐃 - Top Rated Python developer with 100% Job Success across 21 projects - $100K+ earned, 3,910+ hours delivered, strong long-term client retention - Delivered 2,258 hours of Python automation on a single long-term project - Diagnosed and fixed critical Python issues fast on stuck or broken projects 𝐖𝐇𝐘 𝐂𝐋𝐈𝐄𝐍𝐓𝐒 𝐖𝐎𝐑𝐊 𝐖𝐈𝐓𝐇 𝐌𝐄 - Fast, clear communication with no guesswork - Reliable delivery with no missed deadlines - Production-ready Python solutions built to last - Long-term support after delivery 𝐀𝐕𝐀𝐈𝐋𝐀𝐁𝐈𝐋𝐈𝐓𝐘 Timezone GMT+5, with flexible overlap for US, UK, and EU hours. Full-time, part-time, or project-based, ready to start within days. 𝐀𝐃𝐃𝐈𝐓𝐈𝐎𝐍𝐀𝐋 𝐄𝐗𝐏𝐄𝐑𝐓𝐈𝐒𝐄 - Python performance optimization, debugging, and code refactoring for legacy systems - API integrations, payment gateways, and real-time data processing in Python - Technical consulting, code reviews, and architecture planning for Python projects Whether you want to build a new Python project, fix a stuck Python project, or scale your existing Python system, send me a message and let's discuss how my Python expertise can help. I deliver clean, production-ready Python code with long-term support, so your Python solution keeps performing long after delivery.

I build production-grade web applications end-to-end: scalable Python backends with Django and FastAPI, modern React and Next.js frontends, AWS cloud infrastructure, and AI-powered features that work in real production environments - not just demos. 100% Job Success Score. Top Rated Plus. $50K+ earned. 1,994 hours logged. 34 completed jobs. 6+ years building web applications. My longest Upwork client relationship runs 19+ months and counting on a Django ecommerce platform - that is what happens when code is built to last, not just to ship. WHAT CLIENTS HIRE ME FOR : - A SaaS product that needs to scale past MVP into something stable - A backend that needs Django or FastAPI expertise, not a generalist guess - AI features that need to actually work - OpenAI integration, automation, intelligent recommendations - A React or Next.js frontend that connects cleanly to a real backend - Data pipelines, web scraping, or automation that needs to run reliably - AWS deployment done properly - EC2, S3, Lambda, RDS, CI/CD WHAT I HAVE BUILT - REAL PROJECTS : Multi-Tenant SaaS Platform: Built with Python, Django, FastAPI, and React. Multi-tenant architecture supporting multiple client organizations on shared infrastructure. AI Coaching Platform: Python, Django, OpenAI integration, and Celery for background task processing. AI-powered coaching logic running on production infrastructure, not a prototype. Location-Based Food Platform: GeoDjango and PostGIS for geospatial data, deployed on AWS. Real-time location-based matching and routing. Django Ecommerce Backend: Ongoing client relationship since September 2024 (19+ months), 279+ hours logged. Continuous feature development and platform maintenance. Call Tracking and Analytics System: Webhook-based backend for call tracking, analytics, and agent callback routing in real time. TECH STACK : Backend: Python, Django, FastAPI, Flask, Celery, Django REST Framework Frontend: React, Next.js, TypeScript, TailwindCSS Databases: PostgreSQL, MongoDB, Redis, GeoDjango/PostGIS Cloud and DevOps: AWS (EC2, S3, Lambda, RDS), Docker, GitHub Actions, CI/CD AI and Automation: OpenAI API, LangChain, AI Agents, Web Scraping (Selenium, Playwright) Integrations: Stripe, PayPal, Twilio, SendGrid, OAuth, JWT Authentication, Webhooks HOW I WORK : I write clean, well-documented code that the next developer can actually understand. I communicate progress clearly instead of disappearing until delivery. I test before I ship. Fluent in English, available across time zones, and I respond within a few hours. Building a SaaS product, need a Python backend that scales, or want AI features that actually work - send me your project details. Keywords: Full Stack Python Developer, Python Developer, Backend Developer, Django Developer, FastAPI Developer, Flask Developer, React Developer, Next.js Developer, TypeScript Developer, AWS Developer, AWS Lambda, Amazon API Gateway, REST API Development, GraphQL Developer, Django REST Framework, API Integration, Third Party API Integration, JWT Authentication, OAuth Integration, Stripe Integration, PayPal Integration, Webhook Integration, AI Integration, OpenAI API Integration, AI SaaS Development, LangChain Developer, AI Agent Development, RAG Development, LLM Integration, SaaS Development, SaaS Platform, Multi-tenant SaaS, B2B SaaS, MVP Development, Custom Web App, Web Application Development, PostgreSQL Developer, PostgreSQL Optimization, MongoDB Developer, Redis Caching, Database Design, Database Optimization, Docker Deployment, Docker Containerization, CI/CD Pipeline, GitHub Actions, Celery Task Queue, Background Job Processing, Async Python, Web Scraping, Data Scraping, Selenium Automation, Playwright Scraping, Data Automation, Data Pipeline, Microservices, Microservices Architecture, Scalable Backend, Payment Integration, GeoDjango, PostGIS, AWS Solutions Architect, Database Migration

If you have an idea for your company, we can materialize it. I provide options to fit all your needs to project your professionalism and brand! I can write fast, maintainable code in very short period of time. My main strengths are web scraping and automatization, API implementation, and multiprocessing. Also very passionate about Linux operating systems. I offer full implementation between different operating systems. ~ Norbert Bota

Hi there! 👋 I’m Dmytro - a Full Stack & AI Developer with 4+ years of hands-on experience building scalable web apps, AI-powered solutions, and high-performance backend systems. I specialize in: ⚙️ Building fast, secure APIs with Python (FastAPI, Django) 🌐 Modern frontends with React / Vue.js 🧠 AI/ML integration ☁️ Cloud deployment & scaling on AWS I’ve successfully delivered projects ranging from AI design automation systems and healthcare data platforms to real-time predictive sports analytics apps. My code is clean, production-ready, and optimized for scale - I care deeply about architecture, CI/CD, and robust testing. Let’s team up to bring your idea to life - from concept to fully deployed solution 🚀

I build high-performance web applications, scalable APIs, and cloud-based solutions using Python, Django, FastAPI, AI Integration, and React. Experienced in full-stack development, REST API architecture, database design, microservices, and AI-powered applications. Passionate about delivering secure, efficient, and business-driven software solutions that scale. 💻 Backend & ERP Specialist | Odoo Customization | Web Scraping & API Integration 🚀 With 5+ years of experience, I specialize in crafting scalable, robust, and high-performance backend solutions using Python, Odoo, Django, Flask, and FastAPI. Whether you're looking for custom ERP development, API integration, or deploying cloud-based applications on AWS, I deliver optimized, reliable, and scalable solutions tailored to your business needs. 🔹 What I Offer: ✅ Odoo ERP Development: Custom module creation, workflows, reports, and integrations. ✅ Backend Development: Expertise in Django, Flask, FastAPI for secure and efficient server-side logic. ✅ API Development & Integration: RESTful APIs and third-party service integrations. ✅ Web Scraping & Automation: Using Selenium, BeautifulSoup, and Pandas for data collection and automation tasks. ✅ Cloud Deployment: AWS (EC2, RDS, Lambda, S3) for reliable and scalable deployments. ✅ Database Optimization: PostgreSQL, MySQL, MongoDB performance tuning and efficient querying. ✅ DevOps & CI/CD: Docker-based development, Git version control, and automated pipelines. ✅ Technical Documentation: Clear and concise documentation for easy maintenance and scaling. 🛠 Tech Stack & Tools: Languages: Python Frameworks: Odoo, Django, Flask, FastAPI, Django REST Framework Frontend: HTML, CSS, JavaScript Libraries: Pandas, NumPy, OpenCV, Selenium, BeautifulSoup Cloud & DevOps: AWS (EC2, RDS, Lambda, S3), Docker, Git Databases: PostgreSQL, MySQL, MongoDB OS: Windows, Linux, macOS 🌟 Why Work With Me? 🔹 5+ years in Python & ERP development 🔹 Proven ability to customize and scale Odoo solutions 🔹 Deep understanding of backend performance optimization 🔹 Strong problem-solving & debugging skills 🔹 On-time delivery, clear communication, and clean, maintainable code Let's connect and bring your idea to life with efficient and scalable backend solutions powered by Python and Odoo. 🚀

Top Rated Plus ERP & Automation Expert helping businesses streamline operations, reduce manual work, and build reliable systems that save time and money. I help companies design, build, and improve ERP systems, internal tools, integrations, and automation workflows. My focus is not just writing code — I build practical business solutions that make daily operations faster, clearer, and easier to manage. I work as an independent specialist and agency lead, which allows me to handle both focused development tasks and larger end-to-end implementation projects. What I can help you with ✅ ERP implementation and customization Odoo setup, module customization, workflow design, business logic, reports, permissions, and process automation. ✅ Business process automation Automating repetitive tasks, reducing manual data entry, connecting departments, and improving operational efficiency. ✅ API integrations Connecting ERP systems, CRMs, marketplaces, payment systems, shipping providers, accounting tools, internal platforms, and third-party services. ✅ Custom internal tools Dashboards, admin panels, reporting systems, data management tools, approval flows, and business-specific applications. ✅ Data automation and web scraping Reliable data collection, data pipelines, monitoring tools, competitor tracking, lead generation systems, and automated reporting. ✅ Backend development Scalable backend systems using Python, FastAPI, Django, Flask, PostgreSQL, Redis, Celery, Docker, and AWS. Why clients work with me ⭐ Business-first approach I start by understanding your workflow, bottlenecks, and goals before choosing the technical solution. ⭐ Clean and scalable architecture I build systems that are maintainable, documented, and ready to grow with your business. ⭐ Clear communication You will always understand what is being done, why it matters, and what the next step is. ⭐ End-to-end delivery From analysis and planning to development, deployment, integrations, and long-term support. ⭐ Top Rated Plus reliability I have a strong track record of delivering successful projects on Upwork with high client satisfaction. Technologies I work with ERP & Business Systems: Odoo, custom ERP, CRM integrations, workflow automation Backend: Python, Django, FastAPI, Flask Automation: Celery, Redis, RabbitMQ, scheduled jobs, data pipelines Databases: PostgreSQL, MySQL, MongoDB, SQLite, DynamoDB Cloud & DevOps: Docker, AWS EC2, RDS, S3, CloudFront, Route 53, IAM Frontend & APIs: JavaScript, TypeScript, HTML/CSS, REST APIs Data & Scraping: Scrapy, BeautifulSoup, Selenium I can also support high-performance automation and blockchain-related tools using Rust when speed, concurrency, or reliability are critical. Typical projects I can deliver • Odoo ERP customization for sales, inventory, invoicing, CRM, HR, or operations • Automation of manual business workflows • Integration between ERP, CRM, marketplaces, and accounting systems • Custom dashboards and reporting tools • Internal business management platforms • Data scraping and automated data processing systems • Backend APIs for web and mobile applications • Migration from spreadsheets/manual processes to structured systems If your business relies on repetitive manual work, disconnected tools, or inefficient processes, I can help you turn that into a clean, automated, and scalable system.